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Initial commit.

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Code copied from pysqlite3@7166533537d111f8d53f8326bd92622659531cf4
This commit is contained in:
Charles Leifer 2019-06-03 09:03:53 -05:00
commit 526466c0ab
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/* cache .c - a LRU cache
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "cache.h"
#include <limits.h>
/* only used internally */
pysqlite_Node* pysqlite_new_node(PyObject* key, PyObject* data)
{
pysqlite_Node* node;
node = (pysqlite_Node*) (pysqlite_NodeType.tp_alloc(&pysqlite_NodeType, 0));
if (!node) {
return NULL;
}
Py_INCREF(key);
node->key = key;
Py_INCREF(data);
node->data = data;
node->prev = NULL;
node->next = NULL;
return node;
}
void pysqlite_node_dealloc(pysqlite_Node* self)
{
Py_DECREF(self->key);
Py_DECREF(self->data);
Py_TYPE(self)->tp_free((PyObject*)self);
}
int pysqlite_cache_init(pysqlite_Cache* self, PyObject* args, PyObject* kwargs)
{
PyObject* factory;
int size = 10;
self->factory = NULL;
if (!PyArg_ParseTuple(args, "O|i", &factory, &size)) {
return -1;
}
/* minimum cache size is 5 entries */
if (size < 5) {
size = 5;
}
self->size = size;
self->first = NULL;
self->last = NULL;
self->mapping = PyDict_New();
if (!self->mapping) {
return -1;
}
Py_INCREF(factory);
self->factory = factory;
self->decref_factory = 1;
return 0;
}
void pysqlite_cache_dealloc(pysqlite_Cache* self)
{
pysqlite_Node* node;
pysqlite_Node* delete_node;
if (!self->factory) {
/* constructor failed, just get out of here */
return;
}
/* iterate over all nodes and deallocate them */
node = self->first;
while (node) {
delete_node = node;
node = node->next;
Py_DECREF(delete_node);
}
if (self->decref_factory) {
Py_DECREF(self->factory);
}
Py_DECREF(self->mapping);
Py_TYPE(self)->tp_free((PyObject*)self);
}
PyObject* pysqlite_cache_get(pysqlite_Cache* self, PyObject* args)
{
PyObject* key = args;
pysqlite_Node* node;
pysqlite_Node* ptr;
PyObject* data;
node = (pysqlite_Node*)PyDict_GetItemWithError(self->mapping, key);
if (node) {
/* an entry for this key already exists in the cache */
/* increase usage counter of the node found */
if (node->count < LONG_MAX) {
node->count++;
}
/* if necessary, reorder entries in the cache by swapping positions */
if (node->prev && node->count > node->prev->count) {
ptr = node->prev;
while (ptr->prev && node->count > ptr->prev->count) {
ptr = ptr->prev;
}
if (node->next) {
node->next->prev = node->prev;
} else {
self->last = node->prev;
}
if (node->prev) {
node->prev->next = node->next;
}
if (ptr->prev) {
ptr->prev->next = node;
} else {
self->first = node;
}
node->next = ptr;
node->prev = ptr->prev;
if (!node->prev) {
self->first = node;
}
ptr->prev = node;
}
}
else if (PyErr_Occurred()) {
return NULL;
}
else {
/* There is no entry for this key in the cache, yet. We'll insert a new
* entry in the cache, and make space if necessary by throwing the
* least used item out of the cache. */
if (PyDict_Size(self->mapping) == self->size) {
if (self->last) {
node = self->last;
if (PyDict_DelItem(self->mapping, self->last->key) != 0) {
return NULL;
}
if (node->prev) {
node->prev->next = NULL;
}
self->last = node->prev;
node->prev = NULL;
Py_DECREF(node);
}
}
data = PyObject_CallFunction(self->factory, "O", key);
if (!data) {
return NULL;
}
node = pysqlite_new_node(key, data);
if (!node) {
return NULL;
}
node->prev = self->last;
Py_DECREF(data);
if (PyDict_SetItem(self->mapping, key, (PyObject*)node) != 0) {
Py_DECREF(node);
return NULL;
}
if (self->last) {
self->last->next = node;
} else {
self->first = node;
}
self->last = node;
}
Py_INCREF(node->data);
return node->data;
}
PyObject* pysqlite_cache_display(pysqlite_Cache* self, PyObject* args)
{
pysqlite_Node* ptr;
PyObject* prevkey;
PyObject* nextkey;
PyObject* display_str;
ptr = self->first;
while (ptr) {
if (ptr->prev) {
prevkey = ptr->prev->key;
} else {
prevkey = Py_None;
}
if (ptr->next) {
nextkey = ptr->next->key;
} else {
nextkey = Py_None;
}
display_str = PyUnicode_FromFormat("%S <- %S -> %S\n",
prevkey, ptr->key, nextkey);
if (!display_str) {
return NULL;
}
PyObject_Print(display_str, stdout, Py_PRINT_RAW);
Py_DECREF(display_str);
ptr = ptr->next;
}
Py_RETURN_NONE;
}
static PyMethodDef cache_methods[] = {
{"get", (PyCFunction)pysqlite_cache_get, METH_O,
PyDoc_STR("Gets an entry from the cache or calls the factory function to produce one.")},
{"display", (PyCFunction)pysqlite_cache_display, METH_NOARGS,
PyDoc_STR("For debugging only.")},
{NULL, NULL}
};
PyTypeObject pysqlite_NodeType = {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME "Node", /* tp_name */
sizeof(pysqlite_Node), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_node_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
PyTypeObject pysqlite_CacheType = {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME ".Cache", /* tp_name */
sizeof(pysqlite_Cache), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_cache_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
cache_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)pysqlite_cache_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int pysqlite_cache_setup_types(void)
{
int rc;
pysqlite_NodeType.tp_new = PyType_GenericNew;
pysqlite_CacheType.tp_new = PyType_GenericNew;
rc = PyType_Ready(&pysqlite_NodeType);
if (rc < 0) {
return rc;
}
rc = PyType_Ready(&pysqlite_CacheType);
return rc;
}

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/* cache.h - definitions for the LRU cache
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_CACHE_H
#define PYSQLITE_CACHE_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
/* The LRU cache is implemented as a combination of a doubly-linked with a
* dictionary. The list items are of type 'Node' and the dictionary has the
* nodes as values. */
typedef struct _pysqlite_Node
{
PyObject_HEAD
PyObject* key;
PyObject* data;
long count;
struct _pysqlite_Node* prev;
struct _pysqlite_Node* next;
} pysqlite_Node;
typedef struct
{
PyObject_HEAD
int size;
/* a dictionary mapping keys to Node entries */
PyObject* mapping;
/* the factory callable */
PyObject* factory;
pysqlite_Node* first;
pysqlite_Node* last;
/* if set, decrement the factory function when the Cache is deallocated.
* this is almost always desirable, but not in the pysqlite context */
int decref_factory;
} pysqlite_Cache;
extern PyTypeObject pysqlite_NodeType;
extern PyTypeObject pysqlite_CacheType;
int pysqlite_node_init(pysqlite_Node* self, PyObject* args, PyObject* kwargs);
void pysqlite_node_dealloc(pysqlite_Node* self);
int pysqlite_cache_init(pysqlite_Cache* self, PyObject* args, PyObject* kwargs);
void pysqlite_cache_dealloc(pysqlite_Cache* self);
PyObject* pysqlite_cache_get(pysqlite_Cache* self, PyObject* args);
int pysqlite_cache_setup_types(void);
#endif

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/* connection.h - definitions for the connection type
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_CONNECTION_H
#define PYSQLITE_CONNECTION_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "pythread.h"
#include "structmember.h"
#include "cache.h"
#include "module.h"
#include "sqlcipher/sqlite3.h"
typedef struct
{
PyObject_HEAD
sqlite3* db;
/* the type detection mode. Only 0, PARSE_DECLTYPES, PARSE_COLNAMES or a
* bitwise combination thereof makes sense */
int detect_types;
/* the timeout value in seconds for database locks */
double timeout;
/* for internal use in the timeout handler: when did the timeout handler
* first get called with count=0? */
double timeout_started;
/* None for autocommit, otherwise a PyUnicode with the isolation level */
PyObject* isolation_level;
/* NULL for autocommit, otherwise a string with the BEGIN statement */
const char* begin_statement;
/* 1 if a check should be performed for each API call if the connection is
* used from the same thread it was created in */
int check_same_thread;
int initialized;
/* thread identification of the thread the connection was created in */
unsigned long thread_ident;
pysqlite_Cache* statement_cache;
/* Lists of weak references to statements and cursors used within this connection */
PyObject* statements;
PyObject* cursors;
/* Counters for how many statements/cursors were created in the connection. May be
* reset to 0 at certain intervals */
int created_statements;
int created_cursors;
PyObject* row_factory;
/* Determines how bytestrings from SQLite are converted to Python objects:
* - PyUnicode_Type: Python Unicode objects are constructed from UTF-8 bytestrings
* - PyBytes_Type: The bytestrings are returned as-is.
* - Any custom callable: Any object returned from the callable called with the bytestring
* as single parameter.
*/
PyObject* text_factory;
/* remember references to functions/classes used in
* create_function/create/aggregate, use these as dictionary keys, so we
* can keep the total system refcount constant by clearing that dictionary
* in connection_dealloc */
PyObject* function_pinboard;
/* a dictionary of registered collation name => collation callable mappings */
PyObject* collations;
/* Exception objects */
PyObject* Warning;
PyObject* Error;
PyObject* InterfaceError;
PyObject* DatabaseError;
PyObject* DataError;
PyObject* OperationalError;
PyObject* IntegrityError;
PyObject* InternalError;
PyObject* ProgrammingError;
PyObject* NotSupportedError;
} pysqlite_Connection;
extern PyTypeObject pysqlite_ConnectionType;
PyObject* pysqlite_connection_alloc(PyTypeObject* type, int aware);
void pysqlite_connection_dealloc(pysqlite_Connection* self);
PyObject* pysqlite_connection_cursor(pysqlite_Connection* self, PyObject* args, PyObject* kwargs);
PyObject* pysqlite_connection_close(pysqlite_Connection* self, PyObject* args);
PyObject* _pysqlite_connection_begin(pysqlite_Connection* self);
PyObject* pysqlite_connection_commit(pysqlite_Connection* self, PyObject* args);
PyObject* pysqlite_connection_rollback(pysqlite_Connection* self, PyObject* args);
PyObject* pysqlite_connection_new(PyTypeObject* type, PyObject* args, PyObject* kw);
int pysqlite_connection_init(pysqlite_Connection* self, PyObject* args, PyObject* kwargs);
int pysqlite_connection_register_cursor(pysqlite_Connection* connection, PyObject* cursor);
int pysqlite_check_thread(pysqlite_Connection* self);
int pysqlite_check_connection(pysqlite_Connection* con);
int pysqlite_connection_setup_types(void);
#endif

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/* cursor.c - the cursor type
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "cursor.h"
#include "module.h"
#include "util.h"
PyObject* pysqlite_cursor_iternext(pysqlite_Cursor* self);
static const char errmsg_fetch_across_rollback[] = "Cursor needed to be reset because of commit/rollback and can no longer be fetched from.";
static int pysqlite_cursor_init(pysqlite_Cursor* self, PyObject* args, PyObject* kwargs)
{
pysqlite_Connection* connection;
if (!PyArg_ParseTuple(args, "O!", &pysqlite_ConnectionType, &connection))
{
return -1;
}
Py_INCREF(connection);
Py_XSETREF(self->connection, connection);
Py_CLEAR(self->statement);
Py_CLEAR(self->next_row);
Py_CLEAR(self->row_cast_map);
Py_INCREF(Py_None);
Py_XSETREF(self->description, Py_None);
Py_INCREF(Py_None);
Py_XSETREF(self->lastrowid, Py_None);
self->arraysize = 1;
self->closed = 0;
self->reset = 0;
self->rowcount = -1L;
Py_INCREF(Py_None);
Py_XSETREF(self->row_factory, Py_None);
if (!pysqlite_check_thread(self->connection)) {
return -1;
}
if (!pysqlite_connection_register_cursor(connection, (PyObject*)self)) {
return -1;
}
self->initialized = 1;
return 0;
}
static void pysqlite_cursor_dealloc(pysqlite_Cursor* self)
{
/* Reset the statement if the user has not closed the cursor */
if (self->statement) {
pysqlite_statement_reset(self->statement);
Py_DECREF(self->statement);
}
Py_XDECREF(self->connection);
Py_XDECREF(self->row_cast_map);
Py_XDECREF(self->description);
Py_XDECREF(self->lastrowid);
Py_XDECREF(self->row_factory);
Py_XDECREF(self->next_row);
if (self->in_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)self);
}
Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
_pysqlite_get_converter(const char *keystr, Py_ssize_t keylen)
{
PyObject *key;
PyObject *upcase_key;
PyObject *retval;
_Py_IDENTIFIER(upper);
key = PyUnicode_FromStringAndSize(keystr, keylen);
if (!key) {
return NULL;
}
upcase_key = _PyObject_CallMethodId(key, &PyId_upper, NULL);
Py_DECREF(key);
if (!upcase_key) {
return NULL;
}
retval = PyDict_GetItemWithError(_pysqlite_converters, upcase_key);
Py_DECREF(upcase_key);
return retval;
}
static int
pysqlite_build_row_cast_map(pysqlite_Cursor* self)
{
int i;
const char* pos;
const char* colname;
const char* decltype;
PyObject* converter;
if (!self->connection->detect_types) {
return 0;
}
Py_XSETREF(self->row_cast_map, PyList_New(0));
if (!self->row_cast_map) {
return -1;
}
for (i = 0; i < sqlite3_column_count(self->statement->st); i++) {
converter = NULL;
if (self->connection->detect_types & PARSE_COLNAMES) {
colname = sqlite3_column_name(self->statement->st, i);
if (colname) {
const char *type_start = NULL;
for (pos = colname; *pos != 0; pos++) {
if (*pos == '[') {
type_start = pos + 1;
}
else if (*pos == ']' && type_start != NULL) {
converter = _pysqlite_get_converter(type_start, pos - type_start);
if (!converter && PyErr_Occurred()) {
Py_CLEAR(self->row_cast_map);
return -1;
}
break;
}
}
}
}
if (!converter && self->connection->detect_types & PARSE_DECLTYPES) {
decltype = sqlite3_column_decltype(self->statement->st, i);
if (decltype) {
for (pos = decltype;;pos++) {
/* Converter names are split at '(' and blanks.
* This allows 'INTEGER NOT NULL' to be treated as 'INTEGER' and
* 'NUMBER(10)' to be treated as 'NUMBER', for example.
* In other words, it will work as people expect it to work.*/
if (*pos == ' ' || *pos == '(' || *pos == 0) {
converter = _pysqlite_get_converter(decltype, pos - decltype);
if (!converter && PyErr_Occurred()) {
Py_CLEAR(self->row_cast_map);
return -1;
}
break;
}
}
}
}
if (!converter) {
converter = Py_None;
}
if (PyList_Append(self->row_cast_map, converter) != 0) {
Py_CLEAR(self->row_cast_map);
return -1;
}
}
return 0;
}
static PyObject *
_pysqlite_build_column_name(const char* colname)
{
const char* pos;
if (!colname) {
Py_RETURN_NONE;
}
for (pos = colname;; pos++) {
if (*pos == 0 || *pos == '[') {
if ((*pos == '[') && (pos > colname) && (*(pos-1) == ' ')) {
pos--;
}
return PyUnicode_FromStringAndSize(colname, pos - colname);
}
}
}
/*
* Returns a row from the currently active SQLite statement
*
* Precondidition:
* - sqlite3_step() has been called before and it returned SQLITE_ROW.
*/
static PyObject *
_pysqlite_fetch_one_row(pysqlite_Cursor* self)
{
int i, numcols;
PyObject* row;
PyObject* item = NULL;
int coltype;
PyObject* converter;
PyObject* converted;
Py_ssize_t nbytes;
const char* val_str;
char buf[200];
const char* colname;
PyObject* error_msg;
if (self->reset) {
PyErr_SetString(pysqlite_InterfaceError, errmsg_fetch_across_rollback);
return NULL;
}
Py_BEGIN_ALLOW_THREADS
numcols = sqlite3_data_count(self->statement->st);
Py_END_ALLOW_THREADS
row = PyTuple_New(numcols);
if (!row)
return NULL;
for (i = 0; i < numcols; i++) {
if (self->connection->detect_types
&& self->row_cast_map != NULL
&& i < PyList_GET_SIZE(self->row_cast_map))
{
converter = PyList_GET_ITEM(self->row_cast_map, i);
}
else {
converter = Py_None;
}
if (converter != Py_None) {
nbytes = sqlite3_column_bytes(self->statement->st, i);
val_str = (const char*)sqlite3_column_blob(self->statement->st, i);
if (!val_str) {
Py_INCREF(Py_None);
converted = Py_None;
} else {
item = PyBytes_FromStringAndSize(val_str, nbytes);
if (!item)
goto error;
converted = PyObject_CallFunction(converter, "O", item);
Py_DECREF(item);
}
} else {
Py_BEGIN_ALLOW_THREADS
coltype = sqlite3_column_type(self->statement->st, i);
Py_END_ALLOW_THREADS
if (coltype == SQLITE_NULL) {
Py_INCREF(Py_None);
converted = Py_None;
} else if (coltype == SQLITE_INTEGER) {
converted = _pysqlite_long_from_int64(sqlite3_column_int64(self->statement->st, i));
} else if (coltype == SQLITE_FLOAT) {
converted = PyFloat_FromDouble(sqlite3_column_double(self->statement->st, i));
} else if (coltype == SQLITE_TEXT) {
val_str = (const char*)sqlite3_column_text(self->statement->st, i);
nbytes = sqlite3_column_bytes(self->statement->st, i);
if (self->connection->text_factory == (PyObject*)&PyUnicode_Type) {
converted = PyUnicode_FromStringAndSize(val_str, nbytes);
if (!converted && PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) {
PyErr_Clear();
colname = sqlite3_column_name(self->statement->st, i);
if (!colname) {
colname = "<unknown column name>";
}
PyOS_snprintf(buf, sizeof(buf) - 1, "Could not decode to UTF-8 column '%s' with text '%s'",
colname , val_str);
error_msg = PyUnicode_Decode(buf, strlen(buf), "ascii", "replace");
if (!error_msg) {
PyErr_SetString(pysqlite_OperationalError, "Could not decode to UTF-8");
} else {
PyErr_SetObject(pysqlite_OperationalError, error_msg);
Py_DECREF(error_msg);
}
}
} else if (self->connection->text_factory == (PyObject*)&PyBytes_Type) {
converted = PyBytes_FromStringAndSize(val_str, nbytes);
} else if (self->connection->text_factory == (PyObject*)&PyByteArray_Type) {
converted = PyByteArray_FromStringAndSize(val_str, nbytes);
} else {
converted = PyObject_CallFunction(self->connection->text_factory, "y#", val_str, nbytes);
}
} else {
/* coltype == SQLITE_BLOB */
nbytes = sqlite3_column_bytes(self->statement->st, i);
converted = PyBytes_FromStringAndSize(
sqlite3_column_blob(self->statement->st, i), nbytes);
}
}
if (!converted) {
goto error;
}
PyTuple_SetItem(row, i, converted);
}
if (PyErr_Occurred())
goto error;
return row;
error:
Py_DECREF(row);
return NULL;
}
/*
* Checks if a cursor object is usable.
*
* 0 => error; 1 => ok
*/
static int check_cursor(pysqlite_Cursor* cur)
{
if (!cur->initialized) {
PyErr_SetString(pysqlite_ProgrammingError, "Base Cursor.__init__ not called.");
return 0;
}
if (cur->closed) {
PyErr_SetString(pysqlite_ProgrammingError, "Cannot operate on a closed cursor.");
return 0;
}
if (cur->locked) {
PyErr_SetString(pysqlite_ProgrammingError, "Recursive use of cursors not allowed.");
return 0;
}
return pysqlite_check_thread(cur->connection) && pysqlite_check_connection(cur->connection);
}
static PyObject *
_pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* args)
{
PyObject* operation;
PyObject* parameters_list = NULL;
PyObject* parameters_iter = NULL;
PyObject* parameters = NULL;
int i;
int rc;
PyObject* func_args;
PyObject* result;
int numcols;
PyObject* descriptor;
PyObject* second_argument = NULL;
sqlite_int64 lastrowid;
if (!check_cursor(self)) {
goto error;
}
self->locked = 1;
self->reset = 0;
Py_CLEAR(self->next_row);
if (multiple) {
/* executemany() */
if (!PyArg_ParseTuple(args, "OO", &operation, &second_argument)) {
goto error;
}
if (!PyUnicode_Check(operation)) {
PyErr_SetString(PyExc_ValueError, "operation parameter must be str");
goto error;
}
if (PyIter_Check(second_argument)) {
/* iterator */
Py_INCREF(second_argument);
parameters_iter = second_argument;
} else {
/* sequence */
parameters_iter = PyObject_GetIter(second_argument);
if (!parameters_iter) {
goto error;
}
}
} else {
/* execute() */
if (!PyArg_ParseTuple(args, "O|O", &operation, &second_argument)) {
goto error;
}
if (!PyUnicode_Check(operation)) {
PyErr_SetString(PyExc_ValueError, "operation parameter must be str");
goto error;
}
parameters_list = PyList_New(0);
if (!parameters_list) {
goto error;
}
if (second_argument == NULL) {
second_argument = PyTuple_New(0);
if (!second_argument) {
goto error;
}
} else {
Py_INCREF(second_argument);
}
if (PyList_Append(parameters_list, second_argument) != 0) {
Py_DECREF(second_argument);
goto error;
}
Py_DECREF(second_argument);
parameters_iter = PyObject_GetIter(parameters_list);
if (!parameters_iter) {
goto error;
}
}
if (self->statement != NULL) {
/* There is an active statement */
pysqlite_statement_reset(self->statement);
}
/* reset description and rowcount */
Py_INCREF(Py_None);
Py_SETREF(self->description, Py_None);
self->rowcount = 0L;
func_args = PyTuple_New(1);
if (!func_args) {
goto error;
}
Py_INCREF(operation);
if (PyTuple_SetItem(func_args, 0, operation) != 0) {
goto error;
}
if (self->statement) {
(void)pysqlite_statement_reset(self->statement);
}
Py_XSETREF(self->statement,
(pysqlite_Statement *)pysqlite_cache_get(self->connection->statement_cache, func_args));
Py_DECREF(func_args);
if (!self->statement) {
goto error;
}
if (self->statement->in_use) {
Py_SETREF(self->statement,
PyObject_New(pysqlite_Statement, &pysqlite_StatementType));
if (!self->statement) {
goto error;
}
rc = pysqlite_statement_create(self->statement, self->connection, operation);
if (rc != SQLITE_OK) {
Py_CLEAR(self->statement);
goto error;
}
}
pysqlite_statement_reset(self->statement);
pysqlite_statement_mark_dirty(self->statement);
/* We start a transaction implicitly before a DML statement.
SELECT is the only exception. See #9924. */
if (self->connection->begin_statement && self->statement->is_dml) {
if (sqlite3_get_autocommit(self->connection->db)) {
result = _pysqlite_connection_begin(self->connection);
if (!result) {
goto error;
}
Py_DECREF(result);
}
}
while (1) {
parameters = PyIter_Next(parameters_iter);
if (!parameters) {
break;
}
pysqlite_statement_mark_dirty(self->statement);
pysqlite_statement_bind_parameters(self->statement, parameters);
if (PyErr_Occurred()) {
goto error;
}
rc = pysqlite_step(self->statement->st, self->connection);
if (rc != SQLITE_DONE && rc != SQLITE_ROW) {
if (PyErr_Occurred()) {
/* there was an error that occurred in a user-defined callback */
if (_pysqlite_enable_callback_tracebacks) {
PyErr_Print();
} else {
PyErr_Clear();
}
}
(void)pysqlite_statement_reset(self->statement);
_pysqlite_seterror(self->connection->db, NULL);
goto error;
}
if (pysqlite_build_row_cast_map(self) != 0) {
_PyErr_FormatFromCause(pysqlite_OperationalError, "Error while building row_cast_map");
goto error;
}
assert(rc == SQLITE_ROW || rc == SQLITE_DONE);
Py_BEGIN_ALLOW_THREADS
numcols = sqlite3_column_count(self->statement->st);
Py_END_ALLOW_THREADS
if (self->description == Py_None && numcols > 0) {
Py_SETREF(self->description, PyTuple_New(numcols));
if (!self->description) {
goto error;
}
for (i = 0; i < numcols; i++) {
descriptor = PyTuple_New(7);
if (!descriptor) {
goto error;
}
PyTuple_SetItem(descriptor, 0, _pysqlite_build_column_name(sqlite3_column_name(self->statement->st, i)));
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 1, Py_None);
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 2, Py_None);
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 3, Py_None);
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 4, Py_None);
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 5, Py_None);
Py_INCREF(Py_None); PyTuple_SetItem(descriptor, 6, Py_None);
PyTuple_SetItem(self->description, i, descriptor);
}
}
if (self->statement->is_dml) {
self->rowcount += (long)sqlite3_changes(self->connection->db);
} else {
self->rowcount= -1L;
}
if (!multiple) {
Py_DECREF(self->lastrowid);
Py_BEGIN_ALLOW_THREADS
lastrowid = sqlite3_last_insert_rowid(self->connection->db);
Py_END_ALLOW_THREADS
self->lastrowid = _pysqlite_long_from_int64(lastrowid);
}
if (rc == SQLITE_ROW) {
if (multiple) {
PyErr_SetString(pysqlite_ProgrammingError, "executemany() can only execute DML statements.");
goto error;
}
self->next_row = _pysqlite_fetch_one_row(self);
if (self->next_row == NULL)
goto error;
} else if (rc == SQLITE_DONE && !multiple) {
pysqlite_statement_reset(self->statement);
Py_CLEAR(self->statement);
}
if (multiple) {
pysqlite_statement_reset(self->statement);
}
Py_XDECREF(parameters);
}
error:
Py_XDECREF(parameters);
Py_XDECREF(parameters_iter);
Py_XDECREF(parameters_list);
self->locked = 0;
if (PyErr_Occurred()) {
self->rowcount = -1L;
return NULL;
} else {
Py_INCREF(self);
return (PyObject*)self;
}
}
PyObject* pysqlite_cursor_execute(pysqlite_Cursor* self, PyObject* args)
{
return _pysqlite_query_execute(self, 0, args);
}
PyObject* pysqlite_cursor_executemany(pysqlite_Cursor* self, PyObject* args)
{
return _pysqlite_query_execute(self, 1, args);
}
static PyObject *
pysqlite_cursor_executescript(pysqlite_Cursor* self, PyObject* args)
{
PyObject* script_obj;
PyObject* script_str = NULL;
const char* script_cstr;
sqlite3_stmt* statement;
int rc;
PyObject* result;
if (!PyArg_ParseTuple(args, "O", &script_obj)) {
return NULL;
}
if (!check_cursor(self)) {
return NULL;
}
self->reset = 0;
if (PyUnicode_Check(script_obj)) {
script_cstr = PyUnicode_AsUTF8(script_obj);
if (!script_cstr) {
return NULL;
}
} else {
PyErr_SetString(PyExc_ValueError, "script argument must be unicode.");
return NULL;
}
/* commit first */
result = pysqlite_connection_commit(self->connection, NULL);
if (!result) {
goto error;
}
Py_DECREF(result);
while (1) {
Py_BEGIN_ALLOW_THREADS
rc = sqlite3_prepare_v2(self->connection->db,
script_cstr,
-1,
&statement,
&script_cstr);
Py_END_ALLOW_THREADS
if (rc != SQLITE_OK) {
_pysqlite_seterror(self->connection->db, NULL);
goto error;
}
/* execute statement, and ignore results of SELECT statements */
rc = SQLITE_ROW;
while (rc == SQLITE_ROW) {
rc = pysqlite_step(statement, self->connection);
if (PyErr_Occurred()) {
(void)sqlite3_finalize(statement);
goto error;
}
}
if (rc != SQLITE_DONE) {
(void)sqlite3_finalize(statement);
_pysqlite_seterror(self->connection->db, NULL);
goto error;
}
rc = sqlite3_finalize(statement);
if (rc != SQLITE_OK) {
_pysqlite_seterror(self->connection->db, NULL);
goto error;
}
if (*script_cstr == (char)0) {
break;
}
}
error:
Py_XDECREF(script_str);
if (PyErr_Occurred()) {
return NULL;
} else {
Py_INCREF(self);
return (PyObject*)self;
}
}
PyObject* pysqlite_cursor_iternext(pysqlite_Cursor *self)
{
PyObject* next_row_tuple;
PyObject* next_row;
int rc;
if (!check_cursor(self)) {
return NULL;
}
if (self->reset) {
PyErr_SetString(pysqlite_InterfaceError, errmsg_fetch_across_rollback);
return NULL;
}
if (!self->next_row) {
if (self->statement) {
(void)pysqlite_statement_reset(self->statement);
Py_CLEAR(self->statement);
}
return NULL;
}
next_row_tuple = self->next_row;
assert(next_row_tuple != NULL);
self->next_row = NULL;
if (self->row_factory != Py_None) {
next_row = PyObject_CallFunction(self->row_factory, "OO", self, next_row_tuple);
if (next_row == NULL) {
self->next_row = next_row_tuple;
return NULL;
}
Py_DECREF(next_row_tuple);
} else {
next_row = next_row_tuple;
}
if (self->statement) {
rc = pysqlite_step(self->statement->st, self->connection);
if (PyErr_Occurred()) {
(void)pysqlite_statement_reset(self->statement);
Py_DECREF(next_row);
return NULL;
}
if (rc != SQLITE_DONE && rc != SQLITE_ROW) {
(void)pysqlite_statement_reset(self->statement);
Py_DECREF(next_row);
_pysqlite_seterror(self->connection->db, NULL);
return NULL;
}
if (rc == SQLITE_ROW) {
self->next_row = _pysqlite_fetch_one_row(self);
if (self->next_row == NULL) {
(void)pysqlite_statement_reset(self->statement);
return NULL;
}
}
}
return next_row;
}
PyObject* pysqlite_cursor_fetchone(pysqlite_Cursor* self, PyObject* args)
{
PyObject* row;
row = pysqlite_cursor_iternext(self);
if (!row && !PyErr_Occurred()) {
Py_RETURN_NONE;
}
return row;
}
PyObject* pysqlite_cursor_fetchmany(pysqlite_Cursor* self, PyObject* args, PyObject* kwargs)
{
static char *kwlist[] = {"size", NULL, NULL};
PyObject* row;
PyObject* list;
int maxrows = self->arraysize;
int counter = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i:fetchmany", kwlist, &maxrows)) {
return NULL;
}
list = PyList_New(0);
if (!list) {
return NULL;
}
/* just make sure we enter the loop */
row = Py_None;
while (row) {
row = pysqlite_cursor_iternext(self);
if (row) {
PyList_Append(list, row);
Py_DECREF(row);
} else {
break;
}
if (++counter == maxrows) {
break;
}
}
if (PyErr_Occurred()) {
Py_DECREF(list);
return NULL;
} else {
return list;
}
}
PyObject* pysqlite_cursor_fetchall(pysqlite_Cursor* self, PyObject* args)
{
PyObject* row;
PyObject* list;
list = PyList_New(0);
if (!list) {
return NULL;
}
/* just make sure we enter the loop */
row = (PyObject*)Py_None;
while (row) {
row = pysqlite_cursor_iternext(self);
if (row) {
PyList_Append(list, row);
Py_DECREF(row);
}
}
if (PyErr_Occurred()) {
Py_DECREF(list);
return NULL;
} else {
return list;
}
}
PyObject* pysqlite_noop(pysqlite_Connection* self, PyObject* args)
{
/* don't care, return None */
Py_RETURN_NONE;
}
PyObject* pysqlite_cursor_close(pysqlite_Cursor* self, PyObject* args)
{
if (!self->connection) {
PyErr_SetString(pysqlite_ProgrammingError,
"Base Cursor.__init__ not called.");
return NULL;
}
if (!pysqlite_check_thread(self->connection) || !pysqlite_check_connection(self->connection)) {
return NULL;
}
if (self->statement) {
(void)pysqlite_statement_reset(self->statement);
Py_CLEAR(self->statement);
}
self->closed = 1;
Py_RETURN_NONE;
}
static PyMethodDef cursor_methods[] = {
{"execute", (PyCFunction)pysqlite_cursor_execute, METH_VARARGS,
PyDoc_STR("Executes a SQL statement.")},
{"executemany", (PyCFunction)pysqlite_cursor_executemany, METH_VARARGS,
PyDoc_STR("Repeatedly executes a SQL statement.")},
{"executescript", (PyCFunction)pysqlite_cursor_executescript, METH_VARARGS,
PyDoc_STR("Executes a multiple SQL statements at once. Non-standard.")},
{"fetchone", (PyCFunction)pysqlite_cursor_fetchone, METH_NOARGS,
PyDoc_STR("Fetches one row from the resultset.")},
{"fetchmany", (PyCFunction)(void(*)(void))pysqlite_cursor_fetchmany, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("Fetches several rows from the resultset.")},
{"fetchall", (PyCFunction)pysqlite_cursor_fetchall, METH_NOARGS,
PyDoc_STR("Fetches all rows from the resultset.")},
{"close", (PyCFunction)pysqlite_cursor_close, METH_NOARGS,
PyDoc_STR("Closes the cursor.")},
{"setinputsizes", (PyCFunction)pysqlite_noop, METH_VARARGS,
PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
{"setoutputsize", (PyCFunction)pysqlite_noop, METH_VARARGS,
PyDoc_STR("Required by DB-API. Does nothing in pysqlite.")},
{NULL, NULL}
};
static struct PyMemberDef cursor_members[] =
{
{"connection", T_OBJECT, offsetof(pysqlite_Cursor, connection), READONLY},
{"description", T_OBJECT, offsetof(pysqlite_Cursor, description), READONLY},
{"arraysize", T_INT, offsetof(pysqlite_Cursor, arraysize), 0},
{"lastrowid", T_OBJECT, offsetof(pysqlite_Cursor, lastrowid), READONLY},
{"rowcount", T_LONG, offsetof(pysqlite_Cursor, rowcount), READONLY},
{"row_factory", T_OBJECT, offsetof(pysqlite_Cursor, row_factory), 0},
{NULL}
};
static const char cursor_doc[] =
PyDoc_STR("SQLite database cursor class.");
PyTypeObject pysqlite_CursorType = {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME ".Cursor", /* tp_name */
sizeof(pysqlite_Cursor), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_cursor_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
cursor_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
offsetof(pysqlite_Cursor, in_weakreflist), /* tp_weaklistoffset */
PyObject_SelfIter, /* tp_iter */
(iternextfunc)pysqlite_cursor_iternext, /* tp_iternext */
cursor_methods, /* tp_methods */
cursor_members, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)pysqlite_cursor_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int pysqlite_cursor_setup_types(void)
{
pysqlite_CursorType.tp_new = PyType_GenericNew;
return PyType_Ready(&pysqlite_CursorType);
}

70
src/cursor.h Normal file
View file

@ -0,0 +1,70 @@
/* cursor.h - definitions for the cursor type
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_CURSOR_H
#define PYSQLITE_CURSOR_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "statement.h"
#include "connection.h"
#include "module.h"
typedef struct
{
PyObject_HEAD
pysqlite_Connection* connection;
PyObject* description;
PyObject* row_cast_map;
int arraysize;
PyObject* lastrowid;
long rowcount;
PyObject* row_factory;
pysqlite_Statement* statement;
int closed;
int reset;
int locked;
int initialized;
/* the next row to be returned, NULL if no next row available */
PyObject* next_row;
PyObject* in_weakreflist; /* List of weak references */
} pysqlite_Cursor;
extern PyTypeObject pysqlite_CursorType;
PyObject* pysqlite_cursor_execute(pysqlite_Cursor* self, PyObject* args);
PyObject* pysqlite_cursor_executemany(pysqlite_Cursor* self, PyObject* args);
PyObject* pysqlite_cursor_getiter(pysqlite_Cursor *self);
PyObject* pysqlite_cursor_iternext(pysqlite_Cursor *self);
PyObject* pysqlite_cursor_fetchone(pysqlite_Cursor* self, PyObject* args);
PyObject* pysqlite_cursor_fetchmany(pysqlite_Cursor* self, PyObject* args, PyObject* kwargs);
PyObject* pysqlite_cursor_fetchall(pysqlite_Cursor* self, PyObject* args);
PyObject* pysqlite_noop(pysqlite_Connection* self, PyObject* args);
PyObject* pysqlite_cursor_close(pysqlite_Cursor* self, PyObject* args);
int pysqlite_cursor_setup_types(void);
#define UNKNOWN (-1)
#endif

153
src/microprotocols.c Normal file
View file

@ -0,0 +1,153 @@
/* microprotocols.c - minimalist and non-validating protocols implementation
*
* Copyright (C) 2003-2004 Federico Di Gregorio <fog@debian.org>
*
* This file is part of psycopg and was adapted for pysqlite. Federico Di
* Gregorio gave the permission to use it within pysqlite under the following
* license:
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include <Python.h>
#include <structmember.h>
#include "cursor.h"
#include "microprotocols.h"
#include "prepare_protocol.h"
/** the adapters registry **/
static PyObject *psyco_adapters = NULL;
/* pysqlite_microprotocols_init - initialize the adapters dictionary */
int
pysqlite_microprotocols_init(PyObject *dict)
{
/* create adapters dictionary and put it in module namespace */
if ((psyco_adapters = PyDict_New()) == NULL) {
return -1;
}
return PyDict_SetItemString(dict, "adapters", psyco_adapters);
}
/* pysqlite_microprotocols_add - add a reverse type-caster to the dictionary */
int
pysqlite_microprotocols_add(PyTypeObject *type, PyObject *proto, PyObject *cast)
{
PyObject* key;
int rc;
if (proto == NULL) proto = (PyObject*)&pysqlite_PrepareProtocolType;
key = Py_BuildValue("(OO)", (PyObject*)type, proto);
if (!key) {
return -1;
}
rc = PyDict_SetItem(psyco_adapters, key, cast);
Py_DECREF(key);
return rc;
}
/* pysqlite_microprotocols_adapt - adapt an object to the built-in protocol */
PyObject *
pysqlite_microprotocols_adapt(PyObject *obj, PyObject *proto, PyObject *alt)
{
PyObject *adapter, *key, *adapted;
/* we don't check for exact type conformance as specified in PEP 246
because the pysqlite_PrepareProtocolType type is abstract and there is no
way to get a quotable object to be its instance */
/* look for an adapter in the registry */
key = Py_BuildValue("(OO)", (PyObject*)obj->ob_type, proto);
if (!key) {
return NULL;
}
adapter = PyDict_GetItemWithError(psyco_adapters, key);
Py_DECREF(key);
if (adapter) {
Py_INCREF(adapter);
adapted = PyObject_CallFunctionObjArgs(adapter, obj, NULL);
Py_DECREF(adapter);
return adapted;
}
if (PyErr_Occurred()) {
return NULL;
}
/* try to have the protocol adapt this object*/
if (PyObject_HasAttrString(proto, "__adapt__")) {
_Py_IDENTIFIER(__adapt__);
adapted = _PyObject_CallMethodId(proto, &PyId___adapt__, "O", obj);
if (adapted == Py_None) {
Py_DECREF(adapted);
}
else if (adapted || !PyErr_ExceptionMatches(PyExc_TypeError)) {
return adapted;
}
else {
PyErr_Clear();
}
}
/* and finally try to have the object adapt itself */
if (PyObject_HasAttrString(obj, "__conform__")) {
_Py_IDENTIFIER(__conform__);
PyObject *adapted = _PyObject_CallMethodId(obj, &PyId___conform__,"O", proto);
if (adapted == Py_None) {
Py_DECREF(adapted);
}
else if (adapted || !PyErr_ExceptionMatches(PyExc_TypeError)) {
return adapted;
}
else {
PyErr_Clear();
}
}
if (alt) {
Py_INCREF(alt);
return alt;
}
/* else set the right exception and return NULL */
PyErr_SetString(pysqlite_ProgrammingError, "can't adapt");
return NULL;
}
/** module-level functions **/
PyObject *
pysqlite_adapt(pysqlite_Cursor *self, PyObject *args)
{
PyObject *obj, *alt = NULL;
PyObject *proto = (PyObject*)&pysqlite_PrepareProtocolType;
if (!PyArg_ParseTuple(args, "O|OO", &obj, &proto, &alt)) return NULL;
return pysqlite_microprotocols_adapt(obj, proto, alt);
}

52
src/microprotocols.h Normal file
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@ -0,0 +1,52 @@
/* microprotocols.c - definitions for minimalist and non-validating protocols
*
* Copyright (C) 2003-2004 Federico Di Gregorio <fog@debian.org>
*
* This file is part of psycopg and was adapted for pysqlite. Federico Di
* Gregorio gave the permission to use it within pysqlite under the following
* license:
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PSYCOPG_MICROPROTOCOLS_H
#define PSYCOPG_MICROPROTOCOLS_H 1
#define PY_SSIZE_T_CLEAN
#include <Python.h>
/** the names of the three mandatory methods **/
#define MICROPROTOCOLS_GETQUOTED_NAME "getquoted"
#define MICROPROTOCOLS_GETSTRING_NAME "getstring"
#define MICROPROTOCOLS_GETBINARY_NAME "getbinary"
/** exported functions **/
/* used by module.c to init the microprotocols system */
extern int pysqlite_microprotocols_init(PyObject *dict);
extern int pysqlite_microprotocols_add(
PyTypeObject *type, PyObject *proto, PyObject *cast);
extern PyObject *pysqlite_microprotocols_adapt(
PyObject *obj, PyObject *proto, PyObject *alt);
extern PyObject *
pysqlite_adapt(pysqlite_Cursor* self, PyObject *args);
#define pysqlite_adapt_doc \
"adapt(obj, protocol, alternate) -> adapt obj to given protocol. Non-standard."
#endif /* !defined(PSYCOPG_MICROPROTOCOLS_H) */

494
src/module.c Normal file
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@ -0,0 +1,494 @@
/* module.c - the module itself
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "connection.h"
#include "statement.h"
#include "cursor.h"
#include "cache.h"
#include "prepare_protocol.h"
#include "microprotocols.h"
#include "row.h"
#if SQLITE_VERSION_NUMBER >= 3003003
#define HAVE_SHARED_CACHE
#endif
/* static objects at module-level */
PyObject *pysqlite_Error = NULL;
PyObject *pysqlite_Warning = NULL;
PyObject *pysqlite_InterfaceError = NULL;
PyObject *pysqlite_DatabaseError = NULL;
PyObject *pysqlite_InternalError = NULL;
PyObject *pysqlite_OperationalError = NULL;
PyObject *pysqlite_ProgrammingError = NULL;
PyObject *pysqlite_IntegrityError = NULL;
PyObject *pysqlite_DataError = NULL;
PyObject *pysqlite_NotSupportedError = NULL;
PyObject* _pysqlite_converters = NULL;
int _pysqlite_enable_callback_tracebacks = 0;
int pysqlite_BaseTypeAdapted = 0;
static PyObject* module_connect(PyObject* self, PyObject* args, PyObject*
kwargs)
{
/* Python seems to have no way of extracting a single keyword-arg at
* C-level, so this code is redundant with the one in connection_init in
* connection.c and must always be copied from there ... */
static char *kwlist[] = {
"database", "timeout", "detect_types", "isolation_level",
"check_same_thread", "factory", "cached_statements", "uri",
"flags", "vfs", NULL
};
PyObject* database;
int detect_types = 0;
PyObject* isolation_level;
PyObject* factory = NULL;
int check_same_thread = 1;
int cached_statements;
int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE;
char *vfs = NULL;
int uri = 0;
double timeout = 5.0;
PyObject* result;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|diOiOipiz", kwlist,
&database, &timeout, &detect_types,
&isolation_level, &check_same_thread,
&factory, &cached_statements, &uri,
&flags, &vfs))
{
return NULL;
}
if (factory == NULL) {
factory = (PyObject*)&pysqlite_ConnectionType;
}
result = PyObject_Call(factory, args, kwargs);
return result;
}
PyDoc_STRVAR(module_connect_doc,
"connect(database[, timeout, detect_types, isolation_level,\n\
check_same_thread, factory, cached_statements, uri, flags, vfs])\n\
\n\
Opens a connection to the SQLite database file *database*. You can use\n\
\":memory:\" to open a database connection to a database that resides in\n\
RAM instead of on disk.");
static PyObject* module_complete(PyObject* self, PyObject* args, PyObject*
kwargs)
{
static char *kwlist[] = {"statement", NULL, NULL};
char* statement;
PyObject* result;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", kwlist, &statement))
{
return NULL;
}
if (sqlite3_complete(statement)) {
result = Py_True;
} else {
result = Py_False;
}
Py_INCREF(result);
return result;
}
PyDoc_STRVAR(module_complete_doc,
"complete_statement(sql)\n\
\n\
Checks if a string contains a complete SQL statement. Non-standard.");
#ifdef HAVE_SHARED_CACHE
static PyObject* module_enable_shared_cache(PyObject* self, PyObject* args, PyObject*
kwargs)
{
static char *kwlist[] = {"do_enable", NULL, NULL};
int do_enable;
int rc;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i", kwlist, &do_enable))
{
return NULL;
}
rc = sqlite3_enable_shared_cache(do_enable);
if (rc != SQLITE_OK) {
PyErr_SetString(pysqlite_OperationalError, "Changing the shared_cache flag failed");
return NULL;
} else {
Py_RETURN_NONE;
}
}
PyDoc_STRVAR(module_enable_shared_cache_doc,
"enable_shared_cache(do_enable)\n\
\n\
Enable or disable shared cache mode for the calling thread.\n\
Experimental/Non-standard.");
#endif /* HAVE_SHARED_CACHE */
static PyObject* module_register_adapter(PyObject* self, PyObject* args)
{
PyTypeObject* type;
PyObject* caster;
int rc;
if (!PyArg_ParseTuple(args, "OO", &type, &caster)) {
return NULL;
}
/* a basic type is adapted; there's a performance optimization if that's not the case
* (99 % of all usages) */
if (type == &PyLong_Type || type == &PyFloat_Type
|| type == &PyUnicode_Type || type == &PyByteArray_Type) {
pysqlite_BaseTypeAdapted = 1;
}
rc = pysqlite_microprotocols_add(type, (PyObject*)&pysqlite_PrepareProtocolType, caster);
if (rc == -1)
return NULL;
Py_RETURN_NONE;
}
PyDoc_STRVAR(module_register_adapter_doc,
"register_adapter(type, callable)\n\
\n\
Registers an adapter with pysqlite's adapter registry. Non-standard.");
static PyObject* module_register_converter(PyObject* self, PyObject* args)
{
PyObject* orig_name;
PyObject* name = NULL;
PyObject* callable;
PyObject* retval = NULL;
_Py_IDENTIFIER(upper);
if (!PyArg_ParseTuple(args, "UO", &orig_name, &callable)) {
return NULL;
}
/* convert the name to upper case */
name = _PyObject_CallMethodId(orig_name, &PyId_upper, NULL);
if (!name) {
goto error;
}
if (PyDict_SetItem(_pysqlite_converters, name, callable) != 0) {
goto error;
}
Py_INCREF(Py_None);
retval = Py_None;
error:
Py_XDECREF(name);
return retval;
}
PyDoc_STRVAR(module_register_converter_doc,
"register_converter(typename, callable)\n\
\n\
Registers a converter with pysqlite. Non-standard.");
static PyObject* enable_callback_tracebacks(PyObject* self, PyObject* args)
{
if (!PyArg_ParseTuple(args, "i", &_pysqlite_enable_callback_tracebacks)) {
return NULL;
}
Py_RETURN_NONE;
}
PyDoc_STRVAR(enable_callback_tracebacks_doc,
"enable_callback_tracebacks(flag)\n\
\n\
Enable or disable callback functions throwing errors to stderr.");
static void converters_init(PyObject* dict)
{
_pysqlite_converters = PyDict_New();
if (!_pysqlite_converters) {
return;
}
PyDict_SetItemString(dict, "converters", _pysqlite_converters);
}
static PyMethodDef module_methods[] = {
{"connect", (PyCFunction)(void(*)(void))module_connect,
METH_VARARGS | METH_KEYWORDS, module_connect_doc},
{"complete_statement", (PyCFunction)(void(*)(void))module_complete,
METH_VARARGS | METH_KEYWORDS, module_complete_doc},
#ifdef HAVE_SHARED_CACHE
{"enable_shared_cache", (PyCFunction)(void(*)(void))module_enable_shared_cache,
METH_VARARGS | METH_KEYWORDS, module_enable_shared_cache_doc},
#endif
{"register_adapter", (PyCFunction)module_register_adapter,
METH_VARARGS, module_register_adapter_doc},
{"register_converter", (PyCFunction)module_register_converter,
METH_VARARGS, module_register_converter_doc},
{"adapt", (PyCFunction)pysqlite_adapt, METH_VARARGS,
pysqlite_adapt_doc},
{"enable_callback_tracebacks", (PyCFunction)enable_callback_tracebacks,
METH_VARARGS, enable_callback_tracebacks_doc},
{NULL, NULL}
};
struct _IntConstantPair {
const char *constant_name;
int constant_value;
};
typedef struct _IntConstantPair IntConstantPair;
static const IntConstantPair _int_constants[] = {
{"PARSE_DECLTYPES", PARSE_DECLTYPES},
{"PARSE_COLNAMES", PARSE_COLNAMES},
{"SQLITE_OK", SQLITE_OK},
{"SQLITE_DENY", SQLITE_DENY},
{"SQLITE_IGNORE", SQLITE_IGNORE},
{"SQLITE_CREATE_INDEX", SQLITE_CREATE_INDEX},
{"SQLITE_CREATE_TABLE", SQLITE_CREATE_TABLE},
{"SQLITE_CREATE_TEMP_INDEX", SQLITE_CREATE_TEMP_INDEX},
{"SQLITE_CREATE_TEMP_TABLE", SQLITE_CREATE_TEMP_TABLE},
{"SQLITE_CREATE_TEMP_TRIGGER", SQLITE_CREATE_TEMP_TRIGGER},
{"SQLITE_CREATE_TEMP_VIEW", SQLITE_CREATE_TEMP_VIEW},
{"SQLITE_CREATE_TRIGGER", SQLITE_CREATE_TRIGGER},
{"SQLITE_CREATE_VIEW", SQLITE_CREATE_VIEW},
{"SQLITE_DELETE", SQLITE_DELETE},
{"SQLITE_DROP_INDEX", SQLITE_DROP_INDEX},
{"SQLITE_DROP_TABLE", SQLITE_DROP_TABLE},
{"SQLITE_DROP_TEMP_INDEX", SQLITE_DROP_TEMP_INDEX},
{"SQLITE_DROP_TEMP_TABLE", SQLITE_DROP_TEMP_TABLE},
{"SQLITE_DROP_TEMP_TRIGGER", SQLITE_DROP_TEMP_TRIGGER},
{"SQLITE_DROP_TEMP_VIEW", SQLITE_DROP_TEMP_VIEW},
{"SQLITE_DROP_TRIGGER", SQLITE_DROP_TRIGGER},
{"SQLITE_DROP_VIEW", SQLITE_DROP_VIEW},
{"SQLITE_INSERT", SQLITE_INSERT},
{"SQLITE_OPEN_CREATE", SQLITE_OPEN_CREATE},
{"SQLITE_OPEN_FULLMUTEX", SQLITE_OPEN_FULLMUTEX},
{"SQLITE_OPEN_MEMORY", SQLITE_OPEN_MEMORY},
{"SQLITE_OPEN_NOMUTEX", SQLITE_OPEN_NOMUTEX},
{"SQLITE_OPEN_PRIVATECACHE", SQLITE_OPEN_PRIVATECACHE},
{"SQLITE_OPEN_READONLY", SQLITE_OPEN_READONLY},
{"SQLITE_OPEN_SHAREDCACHE", SQLITE_OPEN_SHAREDCACHE},
{"SQLITE_OPEN_READWRITE", SQLITE_OPEN_READWRITE},
{"SQLITE_OPEN_URI", SQLITE_OPEN_URI},
{"SQLITE_PRAGMA", SQLITE_PRAGMA},
{"SQLITE_READ", SQLITE_READ},
{"SQLITE_SELECT", SQLITE_SELECT},
{"SQLITE_TRANSACTION", SQLITE_TRANSACTION},
{"SQLITE_UPDATE", SQLITE_UPDATE},
{"SQLITE_ATTACH", SQLITE_ATTACH},
{"SQLITE_DETACH", SQLITE_DETACH},
#if SQLITE_VERSION_NUMBER >= 3002001
{"SQLITE_ALTER_TABLE", SQLITE_ALTER_TABLE},
{"SQLITE_REINDEX", SQLITE_REINDEX},
#endif
#if SQLITE_VERSION_NUMBER >= 3003000
{"SQLITE_ANALYZE", SQLITE_ANALYZE},
#endif
#if SQLITE_VERSION_NUMBER >= 3003007
{"SQLITE_CREATE_VTABLE", SQLITE_CREATE_VTABLE},
{"SQLITE_DROP_VTABLE", SQLITE_DROP_VTABLE},
#endif
#if SQLITE_VERSION_NUMBER >= 3003008
{"SQLITE_FUNCTION", SQLITE_FUNCTION},
#endif
#if SQLITE_VERSION_NUMBER >= 3006008
{"SQLITE_SAVEPOINT", SQLITE_SAVEPOINT},
#endif
#if SQLITE_VERSION_NUMBER >= 3008003
{"SQLITE_RECURSIVE", SQLITE_RECURSIVE},
#endif
#if SQLITE_VERSION_NUMBER >= 3006011
{"SQLITE_DONE", SQLITE_DONE},
#endif
{(char*)NULL, 0}
};
static struct PyModuleDef _sqlite3module = {
PyModuleDef_HEAD_INIT,
"_sqlite3",
NULL,
-1,
module_methods,
NULL,
NULL,
NULL,
NULL
};
PyMODINIT_FUNC PyInit__sqlite3(void)
{
PyObject *module, *dict;
PyObject *tmp_obj;
int i;
module = PyModule_Create(&_sqlite3module);
if (!module ||
(pysqlite_row_setup_types() < 0) ||
(pysqlite_cursor_setup_types() < 0) ||
(pysqlite_connection_setup_types() < 0) ||
(pysqlite_cache_setup_types() < 0) ||
(pysqlite_statement_setup_types() < 0) ||
(pysqlite_prepare_protocol_setup_types() < 0)
) {
Py_XDECREF(module);
return NULL;
}
Py_INCREF(&pysqlite_ConnectionType);
PyModule_AddObject(module, "Connection", (PyObject*) &pysqlite_ConnectionType);
Py_INCREF(&pysqlite_CursorType);
PyModule_AddObject(module, "Cursor", (PyObject*) &pysqlite_CursorType);
Py_INCREF(&pysqlite_CacheType);
PyModule_AddObject(module, "Statement", (PyObject*)&pysqlite_StatementType);
Py_INCREF(&pysqlite_StatementType);
PyModule_AddObject(module, "Cache", (PyObject*) &pysqlite_CacheType);
Py_INCREF(&pysqlite_PrepareProtocolType);
PyModule_AddObject(module, "PrepareProtocol", (PyObject*) &pysqlite_PrepareProtocolType);
Py_INCREF(&pysqlite_RowType);
PyModule_AddObject(module, "Row", (PyObject*) &pysqlite_RowType);
if (!(dict = PyModule_GetDict(module))) {
goto error;
}
/*** Create DB-API Exception hierarchy */
if (!(pysqlite_Error = PyErr_NewException(MODULE_NAME ".Error", PyExc_Exception, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "Error", pysqlite_Error);
if (!(pysqlite_Warning = PyErr_NewException(MODULE_NAME ".Warning", PyExc_Exception, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "Warning", pysqlite_Warning);
/* Error subclasses */
if (!(pysqlite_InterfaceError = PyErr_NewException(MODULE_NAME ".InterfaceError", pysqlite_Error, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "InterfaceError", pysqlite_InterfaceError);
if (!(pysqlite_DatabaseError = PyErr_NewException(MODULE_NAME ".DatabaseError", pysqlite_Error, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "DatabaseError", pysqlite_DatabaseError);
/* pysqlite_DatabaseError subclasses */
if (!(pysqlite_InternalError = PyErr_NewException(MODULE_NAME ".InternalError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "InternalError", pysqlite_InternalError);
if (!(pysqlite_OperationalError = PyErr_NewException(MODULE_NAME ".OperationalError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "OperationalError", pysqlite_OperationalError);
if (!(pysqlite_ProgrammingError = PyErr_NewException(MODULE_NAME ".ProgrammingError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "ProgrammingError", pysqlite_ProgrammingError);
if (!(pysqlite_IntegrityError = PyErr_NewException(MODULE_NAME ".IntegrityError", pysqlite_DatabaseError,NULL))) {
goto error;
}
PyDict_SetItemString(dict, "IntegrityError", pysqlite_IntegrityError);
if (!(pysqlite_DataError = PyErr_NewException(MODULE_NAME ".DataError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "DataError", pysqlite_DataError);
if (!(pysqlite_NotSupportedError = PyErr_NewException(MODULE_NAME ".NotSupportedError", pysqlite_DatabaseError, NULL))) {
goto error;
}
PyDict_SetItemString(dict, "NotSupportedError", pysqlite_NotSupportedError);
/* In Python 2.x, setting Connection.text_factory to
OptimizedUnicode caused Unicode objects to be returned for
non-ASCII data and bytestrings to be returned for ASCII data.
Now OptimizedUnicode is an alias for str, so it has no
effect. */
Py_INCREF((PyObject*)&PyUnicode_Type);
PyDict_SetItemString(dict, "OptimizedUnicode", (PyObject*)&PyUnicode_Type);
/* Set integer constants */
for (i = 0; _int_constants[i].constant_name != NULL; i++) {
tmp_obj = PyLong_FromLong(_int_constants[i].constant_value);
if (!tmp_obj) {
goto error;
}
PyDict_SetItemString(dict, _int_constants[i].constant_name, tmp_obj);
Py_DECREF(tmp_obj);
}
if (!(tmp_obj = PyUnicode_FromString(PYSQLITE_VERSION))) {
goto error;
}
PyDict_SetItemString(dict, "version", tmp_obj);
Py_DECREF(tmp_obj);
if (!(tmp_obj = PyUnicode_FromString(sqlite3_libversion()))) {
goto error;
}
PyDict_SetItemString(dict, "sqlite_version", tmp_obj);
Py_DECREF(tmp_obj);
/* initialize microprotocols layer */
pysqlite_microprotocols_init(dict);
/* initialize the default converters */
converters_init(dict);
error:
if (PyErr_Occurred())
{
PyErr_SetString(PyExc_ImportError, MODULE_NAME ": init failed");
Py_DECREF(module);
module = NULL;
}
return module;
}

53
src/module.h Normal file
View file

@ -0,0 +1,53 @@
/* module.h - definitions for the module
*
* Copyright (C) 2004-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_MODULE_H
#define PYSQLITE_MODULE_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#define PYSQLITE_VERSION "2.6.0"
extern PyObject* pysqlite_Error;
extern PyObject* pysqlite_Warning;
extern PyObject* pysqlite_InterfaceError;
extern PyObject* pysqlite_DatabaseError;
extern PyObject* pysqlite_InternalError;
extern PyObject* pysqlite_OperationalError;
extern PyObject* pysqlite_ProgrammingError;
extern PyObject* pysqlite_IntegrityError;
extern PyObject* pysqlite_DataError;
extern PyObject* pysqlite_NotSupportedError;
/* A dictionary, mapping column types (INTEGER, VARCHAR, etc.) to converter
* functions, that convert the SQL value to the appropriate Python value.
* The key is uppercase.
*/
extern PyObject* _pysqlite_converters;
extern int _pysqlite_enable_callback_tracebacks;
extern int pysqlite_BaseTypeAdapted;
#define PARSE_DECLTYPES 1
#define PARSE_COLNAMES 2
#endif

83
src/prepare_protocol.c Normal file
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@ -0,0 +1,83 @@
/* prepare_protocol.c - the protocol for preparing values for SQLite
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "prepare_protocol.h"
int pysqlite_prepare_protocol_init(pysqlite_PrepareProtocol* self, PyObject* args, PyObject* kwargs)
{
return 0;
}
void pysqlite_prepare_protocol_dealloc(pysqlite_PrepareProtocol* self)
{
Py_TYPE(self)->tp_free((PyObject*)self);
}
PyTypeObject pysqlite_PrepareProtocolType= {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME ".PrepareProtocol", /* tp_name */
sizeof(pysqlite_PrepareProtocol), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_prepare_protocol_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)pysqlite_prepare_protocol_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int pysqlite_prepare_protocol_setup_types(void)
{
pysqlite_PrepareProtocolType.tp_new = PyType_GenericNew;
Py_TYPE(&pysqlite_PrepareProtocolType)= &PyType_Type;
return PyType_Ready(&pysqlite_PrepareProtocolType);
}

42
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/* prepare_protocol.h - the protocol for preparing values for SQLite
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_PREPARE_PROTOCOL_H
#define PYSQLITE_PREPARE_PROTOCOL_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
typedef struct
{
PyObject_HEAD
} pysqlite_PrepareProtocol;
extern PyTypeObject pysqlite_PrepareProtocolType;
int pysqlite_prepare_protocol_init(pysqlite_PrepareProtocol* self, PyObject* args, PyObject* kwargs);
void pysqlite_prepare_protocol_dealloc(pysqlite_PrepareProtocol* self);
int pysqlite_prepare_protocol_setup_types(void);
#define UNKNOWN (-1)
#endif

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/* row.c - an enhanced tuple for database rows
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "row.h"
#include "cursor.h"
void pysqlite_row_dealloc(pysqlite_Row* self)
{
Py_XDECREF(self->data);
Py_XDECREF(self->description);
Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
pysqlite_row_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
{
pysqlite_Row *self;
PyObject* data;
pysqlite_Cursor* cursor;
assert(type != NULL && type->tp_alloc != NULL);
if (!_PyArg_NoKeywords("Row", kwargs))
return NULL;
if (!PyArg_ParseTuple(args, "OO", &cursor, &data))
return NULL;
if (!PyObject_TypeCheck((PyObject*)cursor, &pysqlite_CursorType)) {
PyErr_SetString(PyExc_TypeError, "instance of cursor required for first argument");
return NULL;
}
if (!PyTuple_Check(data)) {
PyErr_SetString(PyExc_TypeError, "tuple required for second argument");
return NULL;
}
self = (pysqlite_Row *) type->tp_alloc(type, 0);
if (self == NULL)
return NULL;
Py_INCREF(data);
self->data = data;
Py_INCREF(cursor->description);
self->description = cursor->description;
return (PyObject *) self;
}
PyObject* pysqlite_row_item(pysqlite_Row* self, Py_ssize_t idx)
{
PyObject* item = PyTuple_GetItem(self->data, idx);
Py_XINCREF(item);
return item;
}
PyObject* pysqlite_row_subscript(pysqlite_Row* self, PyObject* idx)
{
Py_ssize_t _idx;
const char *key;
Py_ssize_t nitems, i;
const char *compare_key;
const char *p1;
const char *p2;
PyObject* item;
if (PyLong_Check(idx)) {
_idx = PyNumber_AsSsize_t(idx, PyExc_IndexError);
if (_idx == -1 && PyErr_Occurred())
return NULL;
if (_idx < 0)
_idx += PyTuple_GET_SIZE(self->data);
item = PyTuple_GetItem(self->data, _idx);
Py_XINCREF(item);
return item;
} else if (PyUnicode_Check(idx)) {
key = PyUnicode_AsUTF8(idx);
if (key == NULL)
return NULL;
nitems = PyTuple_Size(self->description);
for (i = 0; i < nitems; i++) {
PyObject *obj;
obj = PyTuple_GET_ITEM(self->description, i);
obj = PyTuple_GET_ITEM(obj, 0);
compare_key = PyUnicode_AsUTF8(obj);
if (!compare_key) {
return NULL;
}
p1 = key;
p2 = compare_key;
while (1) {
if ((*p1 == (char)0) || (*p2 == (char)0)) {
break;
}
if ((*p1 | 0x20) != (*p2 | 0x20)) {
break;
}
p1++;
p2++;
}
if ((*p1 == (char)0) && (*p2 == (char)0)) {
/* found item */
item = PyTuple_GetItem(self->data, i);
Py_INCREF(item);
return item;
}
}
PyErr_SetString(PyExc_IndexError, "No item with that key");
return NULL;
}
else if (PySlice_Check(idx)) {
return PyObject_GetItem(self->data, idx);
}
else {
PyErr_SetString(PyExc_IndexError, "Index must be int or string");
return NULL;
}
}
static Py_ssize_t
pysqlite_row_length(pysqlite_Row* self)
{
return PyTuple_GET_SIZE(self->data);
}
PyObject* pysqlite_row_keys(pysqlite_Row* self, PyObject *Py_UNUSED(ignored))
{
PyObject* list;
Py_ssize_t nitems, i;
list = PyList_New(0);
if (!list) {
return NULL;
}
nitems = PyTuple_Size(self->description);
for (i = 0; i < nitems; i++) {
if (PyList_Append(list, PyTuple_GET_ITEM(PyTuple_GET_ITEM(self->description, i), 0)) != 0) {
Py_DECREF(list);
return NULL;
}
}
return list;
}
static PyObject* pysqlite_iter(pysqlite_Row* self)
{
return PyObject_GetIter(self->data);
}
static Py_hash_t pysqlite_row_hash(pysqlite_Row *self)
{
return PyObject_Hash(self->description) ^ PyObject_Hash(self->data);
}
static PyObject* pysqlite_row_richcompare(pysqlite_Row *self, PyObject *_other, int opid)
{
if (opid != Py_EQ && opid != Py_NE)
Py_RETURN_NOTIMPLEMENTED;
if (PyType_IsSubtype(Py_TYPE(_other), &pysqlite_RowType)) {
pysqlite_Row *other = (pysqlite_Row *)_other;
PyObject *res = PyObject_RichCompare(self->description, other->description, opid);
if ((opid == Py_EQ && res == Py_True)
|| (opid == Py_NE && res == Py_False)) {
Py_DECREF(res);
return PyObject_RichCompare(self->data, other->data, opid);
}
}
Py_RETURN_NOTIMPLEMENTED;
}
PyMappingMethods pysqlite_row_as_mapping = {
/* mp_length */ (lenfunc)pysqlite_row_length,
/* mp_subscript */ (binaryfunc)pysqlite_row_subscript,
/* mp_ass_subscript */ (objobjargproc)0,
};
static PySequenceMethods pysqlite_row_as_sequence = {
/* sq_length */ (lenfunc)pysqlite_row_length,
/* sq_concat */ 0,
/* sq_repeat */ 0,
/* sq_item */ (ssizeargfunc)pysqlite_row_item,
};
static PyMethodDef pysqlite_row_methods[] = {
{"keys", (PyCFunction)pysqlite_row_keys, METH_NOARGS,
PyDoc_STR("Returns the keys of the row.")},
{NULL, NULL}
};
PyTypeObject pysqlite_RowType = {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME ".Row", /* tp_name */
sizeof(pysqlite_Row), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_row_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)pysqlite_row_hash, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
(traverseproc)0, /* tp_traverse */
0, /* tp_clear */
(richcmpfunc)pysqlite_row_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
(getiterfunc)pysqlite_iter, /* tp_iter */
0, /* tp_iternext */
pysqlite_row_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int pysqlite_row_setup_types(void)
{
pysqlite_RowType.tp_new = pysqlite_row_new;
pysqlite_RowType.tp_as_mapping = &pysqlite_row_as_mapping;
pysqlite_RowType.tp_as_sequence = &pysqlite_row_as_sequence;
return PyType_Ready(&pysqlite_RowType);
}

40
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/* row.h - an enhanced tuple for database rows
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_ROW_H
#define PYSQLITE_ROW_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
typedef struct _Row
{
PyObject_HEAD
PyObject* data;
PyObject* description;
} pysqlite_Row;
extern PyTypeObject pysqlite_RowType;
int pysqlite_row_setup_types(void);
#endif

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/* statement.c - the statement type
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "statement.h"
#include "cursor.h"
#include "connection.h"
#include "microprotocols.h"
#include "prepare_protocol.h"
#include "util.h"
/* prototypes */
static int pysqlite_check_remaining_sql(const char* tail);
typedef enum {
LINECOMMENT_1,
IN_LINECOMMENT,
COMMENTSTART_1,
IN_COMMENT,
COMMENTEND_1,
NORMAL
} parse_remaining_sql_state;
typedef enum {
TYPE_LONG,
TYPE_FLOAT,
TYPE_UNICODE,
TYPE_BUFFER,
TYPE_UNKNOWN
} parameter_type;
int pysqlite_statement_create(pysqlite_Statement* self, pysqlite_Connection* connection, PyObject* sql)
{
const char* tail;
int rc;
const char* sql_cstr;
Py_ssize_t sql_cstr_len;
const char* p;
self->st = NULL;
self->in_use = 0;
sql_cstr = PyUnicode_AsUTF8AndSize(sql, &sql_cstr_len);
if (sql_cstr == NULL) {
rc = PYSQLITE_SQL_WRONG_TYPE;
return rc;
}
if (strlen(sql_cstr) != (size_t)sql_cstr_len) {
PyErr_SetString(PyExc_ValueError, "the query contains a null character");
return PYSQLITE_SQL_WRONG_TYPE;
}
self->in_weakreflist = NULL;
Py_INCREF(sql);
self->sql = sql;
Py_BEGIN_ALLOW_THREADS
rc = sqlite3_prepare_v2(connection->db,
sql_cstr,
-1,
&self->st,
&tail);
self->is_dml = !sqlite3_stmt_readonly(self->st);
Py_END_ALLOW_THREADS
/* To retain backward-compatibility, we need to treat DDL and certain types
* of transactions as being "not-dml".
*/
if (self->is_dml) {
for (p = sql_cstr; *p != 0; p++) {
switch (*p) {
case ' ':
case '\r':
case '\n':
case '\t':
continue;
}
/* DML iff statement is not a CREATE/DROP/BEGIN. */
self->is_dml = (PyOS_strnicmp(p, "begin", 5) &&
PyOS_strnicmp(p, "create", 6) &&
PyOS_strnicmp(p, "drop", 4) &&
PyOS_strnicmp(p, "alter", 5) &&
PyOS_strnicmp(p, "analyze", 7) &&
PyOS_strnicmp(p, "reindex", 7) &&
PyOS_strnicmp(p, "vacuum", 6));
break;
}
}
self->db = connection->db;
if (rc == SQLITE_OK && pysqlite_check_remaining_sql(tail)) {
(void)sqlite3_finalize(self->st);
self->st = NULL;
rc = PYSQLITE_TOO_MUCH_SQL;
}
return rc;
}
int pysqlite_statement_bind_parameter(pysqlite_Statement* self, int pos, PyObject* parameter)
{
int rc = SQLITE_OK;
const char *string;
Py_ssize_t buflen;
parameter_type paramtype;
if (parameter == Py_None) {
rc = sqlite3_bind_null(self->st, pos);
goto final;
}
if (PyLong_CheckExact(parameter)) {
paramtype = TYPE_LONG;
} else if (PyFloat_CheckExact(parameter)) {
paramtype = TYPE_FLOAT;
} else if (PyUnicode_CheckExact(parameter)) {
paramtype = TYPE_UNICODE;
} else if (PyLong_Check(parameter)) {
paramtype = TYPE_LONG;
} else if (PyFloat_Check(parameter)) {
paramtype = TYPE_FLOAT;
} else if (PyUnicode_Check(parameter)) {
paramtype = TYPE_UNICODE;
} else if (PyObject_CheckBuffer(parameter)) {
paramtype = TYPE_BUFFER;
} else {
paramtype = TYPE_UNKNOWN;
}
switch (paramtype) {
case TYPE_LONG: {
sqlite_int64 value = _pysqlite_long_as_int64(parameter);
if (value == -1 && PyErr_Occurred())
rc = -1;
else
rc = sqlite3_bind_int64(self->st, pos, value);
break;
}
case TYPE_FLOAT:
rc = sqlite3_bind_double(self->st, pos, PyFloat_AsDouble(parameter));
break;
case TYPE_UNICODE:
string = PyUnicode_AsUTF8AndSize(parameter, &buflen);
if (string == NULL)
return -1;
if (buflen > INT_MAX) {
PyErr_SetString(PyExc_OverflowError,
"string longer than INT_MAX bytes");
return -1;
}
rc = sqlite3_bind_text(self->st, pos, string, (int)buflen, SQLITE_TRANSIENT);
break;
case TYPE_BUFFER: {
Py_buffer view;
if (PyObject_GetBuffer(parameter, &view, PyBUF_SIMPLE) != 0) {
PyErr_SetString(PyExc_ValueError, "could not convert BLOB to buffer");
return -1;
}
if (view.len > INT_MAX) {
PyErr_SetString(PyExc_OverflowError,
"BLOB longer than INT_MAX bytes");
PyBuffer_Release(&view);
return -1;
}
rc = sqlite3_bind_blob(self->st, pos, view.buf, (int)view.len, SQLITE_TRANSIENT);
PyBuffer_Release(&view);
break;
}
case TYPE_UNKNOWN:
rc = -1;
}
final:
return rc;
}
/* returns 0 if the object is one of Python's internal ones that don't need to be adapted */
static int _need_adapt(PyObject* obj)
{
if (pysqlite_BaseTypeAdapted) {
return 1;
}
if (PyLong_CheckExact(obj) || PyFloat_CheckExact(obj)
|| PyUnicode_CheckExact(obj) || PyByteArray_CheckExact(obj)) {
return 0;
} else {
return 1;
}
}
void pysqlite_statement_bind_parameters(pysqlite_Statement* self, PyObject* parameters)
{
PyObject* current_param;
PyObject* adapted;
const char* binding_name;
int i;
int rc;
int num_params_needed;
Py_ssize_t num_params;
Py_BEGIN_ALLOW_THREADS
num_params_needed = sqlite3_bind_parameter_count(self->st);
Py_END_ALLOW_THREADS
if (PyTuple_CheckExact(parameters) || PyList_CheckExact(parameters) || (!PyDict_Check(parameters) && PySequence_Check(parameters))) {
/* parameters passed as sequence */
if (PyTuple_CheckExact(parameters)) {
num_params = PyTuple_GET_SIZE(parameters);
} else if (PyList_CheckExact(parameters)) {
num_params = PyList_GET_SIZE(parameters);
} else {
num_params = PySequence_Size(parameters);
}
if (num_params != num_params_needed) {
PyErr_Format(pysqlite_ProgrammingError,
"Incorrect number of bindings supplied. The current "
"statement uses %d, and there are %zd supplied.",
num_params_needed, num_params);
return;
}
for (i = 0; i < num_params; i++) {
if (PyTuple_CheckExact(parameters)) {
current_param = PyTuple_GET_ITEM(parameters, i);
Py_XINCREF(current_param);
} else if (PyList_CheckExact(parameters)) {
current_param = PyList_GET_ITEM(parameters, i);
Py_XINCREF(current_param);
} else {
current_param = PySequence_GetItem(parameters, i);
}
if (!current_param) {
return;
}
if (!_need_adapt(current_param)) {
adapted = current_param;
} else {
adapted = pysqlite_microprotocols_adapt(current_param, (PyObject*)&pysqlite_PrepareProtocolType, current_param);
Py_DECREF(current_param);
if (!adapted) {
return;
}
}
rc = pysqlite_statement_bind_parameter(self, i + 1, adapted);
Py_DECREF(adapted);
if (rc != SQLITE_OK) {
if (!PyErr_Occurred()) {
PyErr_Format(pysqlite_InterfaceError, "Error binding parameter %d - probably unsupported type.", i);
}
return;
}
}
} else if (PyDict_Check(parameters)) {
/* parameters passed as dictionary */
for (i = 1; i <= num_params_needed; i++) {
PyObject *binding_name_obj;
Py_BEGIN_ALLOW_THREADS
binding_name = sqlite3_bind_parameter_name(self->st, i);
Py_END_ALLOW_THREADS
if (!binding_name) {
PyErr_Format(pysqlite_ProgrammingError, "Binding %d has no name, but you supplied a dictionary (which has only names).", i);
return;
}
binding_name++; /* skip first char (the colon) */
binding_name_obj = PyUnicode_FromString(binding_name);
if (!binding_name_obj) {
return;
}
if (PyDict_CheckExact(parameters)) {
current_param = PyDict_GetItemWithError(parameters, binding_name_obj);
Py_XINCREF(current_param);
} else {
current_param = PyObject_GetItem(parameters, binding_name_obj);
}
Py_DECREF(binding_name_obj);
if (!current_param) {
if (!PyErr_Occurred() || PyErr_ExceptionMatches(PyExc_LookupError)) {
PyErr_Format(pysqlite_ProgrammingError, "You did not supply a value for binding %d.", i);
}
return;
}
if (!_need_adapt(current_param)) {
adapted = current_param;
} else {
adapted = pysqlite_microprotocols_adapt(current_param, (PyObject*)&pysqlite_PrepareProtocolType, current_param);
Py_DECREF(current_param);
if (!adapted) {
return;
}
}
rc = pysqlite_statement_bind_parameter(self, i, adapted);
Py_DECREF(adapted);
if (rc != SQLITE_OK) {
if (!PyErr_Occurred()) {
PyErr_Format(pysqlite_InterfaceError, "Error binding parameter :%s - probably unsupported type.", binding_name);
}
return;
}
}
} else {
PyErr_SetString(PyExc_ValueError, "parameters are of unsupported type");
}
}
int pysqlite_statement_finalize(pysqlite_Statement* self)
{
int rc;
rc = SQLITE_OK;
if (self->st) {
Py_BEGIN_ALLOW_THREADS
rc = sqlite3_finalize(self->st);
Py_END_ALLOW_THREADS
self->st = NULL;
}
self->in_use = 0;
return rc;
}
int pysqlite_statement_reset(pysqlite_Statement* self)
{
int rc;
rc = SQLITE_OK;
if (self->in_use && self->st) {
Py_BEGIN_ALLOW_THREADS
rc = sqlite3_reset(self->st);
Py_END_ALLOW_THREADS
if (rc == SQLITE_OK) {
self->in_use = 0;
}
}
return rc;
}
void pysqlite_statement_mark_dirty(pysqlite_Statement* self)
{
self->in_use = 1;
}
void pysqlite_statement_dealloc(pysqlite_Statement* self)
{
if (self->st) {
Py_BEGIN_ALLOW_THREADS
sqlite3_finalize(self->st);
Py_END_ALLOW_THREADS
}
self->st = NULL;
Py_XDECREF(self->sql);
if (self->in_weakreflist != NULL) {
PyObject_ClearWeakRefs((PyObject*)self);
}
Py_TYPE(self)->tp_free((PyObject*)self);
}
/*
* Checks if there is anything left in an SQL string after SQLite compiled it.
* This is used to check if somebody tried to execute more than one SQL command
* with one execute()/executemany() command, which the DB-API and we don't
* allow.
*
* Returns 1 if there is more left than should be. 0 if ok.
*/
static int pysqlite_check_remaining_sql(const char* tail)
{
const char* pos = tail;
parse_remaining_sql_state state = NORMAL;
for (;;) {
switch (*pos) {
case 0:
return 0;
case '-':
if (state == NORMAL) {
state = LINECOMMENT_1;
} else if (state == LINECOMMENT_1) {
state = IN_LINECOMMENT;
}
break;
case ' ':
case '\t':
break;
case '\n':
case 13:
if (state == IN_LINECOMMENT) {
state = NORMAL;
}
break;
case '/':
if (state == NORMAL) {
state = COMMENTSTART_1;
} else if (state == COMMENTEND_1) {
state = NORMAL;
} else if (state == COMMENTSTART_1) {
return 1;
}
break;
case '*':
if (state == NORMAL) {
return 1;
} else if (state == LINECOMMENT_1) {
return 1;
} else if (state == COMMENTSTART_1) {
state = IN_COMMENT;
} else if (state == IN_COMMENT) {
state = COMMENTEND_1;
}
break;
default:
if (state == COMMENTEND_1) {
state = IN_COMMENT;
} else if (state == IN_LINECOMMENT) {
} else if (state == IN_COMMENT) {
} else {
return 1;
}
}
pos++;
}
return 0;
}
PyTypeObject pysqlite_StatementType = {
PyVarObject_HEAD_INIT(NULL, 0)
MODULE_NAME ".Statement", /* tp_name */
sizeof(pysqlite_Statement), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)pysqlite_statement_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
offsetof(pysqlite_Statement, in_weakreflist), /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)0, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
0 /* tp_free */
};
extern int pysqlite_statement_setup_types(void)
{
pysqlite_StatementType.tp_new = PyType_GenericNew;
return PyType_Ready(&pysqlite_StatementType);
}

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/* statement.h - definitions for the statement type
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_STATEMENT_H
#define PYSQLITE_STATEMENT_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "connection.h"
#include "sqlcipher/sqlite3.h"
#define PYSQLITE_TOO_MUCH_SQL (-100)
#define PYSQLITE_SQL_WRONG_TYPE (-101)
typedef struct
{
PyObject_HEAD
sqlite3* db;
sqlite3_stmt* st;
PyObject* sql;
int in_use;
int is_dml;
PyObject* in_weakreflist; /* List of weak references */
} pysqlite_Statement;
extern PyTypeObject pysqlite_StatementType;
int pysqlite_statement_create(pysqlite_Statement* self, pysqlite_Connection* connection, PyObject* sql);
void pysqlite_statement_dealloc(pysqlite_Statement* self);
int pysqlite_statement_bind_parameter(pysqlite_Statement* self, int pos, PyObject* parameter);
void pysqlite_statement_bind_parameters(pysqlite_Statement* self, PyObject* parameters);
int pysqlite_statement_finalize(pysqlite_Statement* self);
int pysqlite_statement_reset(pysqlite_Statement* self);
void pysqlite_statement_mark_dirty(pysqlite_Statement* self);
int pysqlite_statement_setup_types(void);
#endif

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/* util.c - various utility functions
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#include "module.h"
#include "connection.h"
int pysqlite_step(sqlite3_stmt* statement, pysqlite_Connection* connection)
{
int rc;
if (statement == NULL) {
/* this is a workaround for SQLite 3.5 and later. it now apparently
* returns NULL for "no-operation" statements */
rc = SQLITE_OK;
} else {
Py_BEGIN_ALLOW_THREADS
rc = sqlite3_step(statement);
Py_END_ALLOW_THREADS
}
return rc;
}
/**
* Checks the SQLite error code and sets the appropriate DB-API exception.
* Returns the error code (0 means no error occurred).
*/
int _pysqlite_seterror(sqlite3* db, sqlite3_stmt* st)
{
int errorcode = sqlite3_errcode(db);
switch (errorcode)
{
case SQLITE_OK:
PyErr_Clear();
break;
case SQLITE_INTERNAL:
case SQLITE_NOTFOUND:
PyErr_SetString(pysqlite_InternalError, sqlite3_errmsg(db));
break;
case SQLITE_NOMEM:
(void)PyErr_NoMemory();
break;
case SQLITE_ERROR:
case SQLITE_PERM:
case SQLITE_ABORT:
case SQLITE_BUSY:
case SQLITE_LOCKED:
case SQLITE_READONLY:
case SQLITE_INTERRUPT:
case SQLITE_IOERR:
case SQLITE_FULL:
case SQLITE_CANTOPEN:
case SQLITE_PROTOCOL:
case SQLITE_EMPTY:
case SQLITE_SCHEMA:
PyErr_SetString(pysqlite_OperationalError, sqlite3_errmsg(db));
break;
case SQLITE_CORRUPT:
PyErr_SetString(pysqlite_DatabaseError, sqlite3_errmsg(db));
break;
case SQLITE_TOOBIG:
PyErr_SetString(pysqlite_DataError, sqlite3_errmsg(db));
break;
case SQLITE_CONSTRAINT:
case SQLITE_MISMATCH:
PyErr_SetString(pysqlite_IntegrityError, sqlite3_errmsg(db));
break;
case SQLITE_MISUSE:
PyErr_SetString(pysqlite_ProgrammingError, sqlite3_errmsg(db));
break;
default:
PyErr_SetString(pysqlite_DatabaseError, sqlite3_errmsg(db));
break;
}
return errorcode;
}
#ifdef WORDS_BIGENDIAN
# define IS_LITTLE_ENDIAN 0
#else
# define IS_LITTLE_ENDIAN 1
#endif
PyObject *
_pysqlite_long_from_int64(sqlite_int64 value)
{
# if SIZEOF_LONG_LONG < 8
if (value > PY_LLONG_MAX || value < PY_LLONG_MIN) {
return _PyLong_FromByteArray(&value, sizeof(value),
IS_LITTLE_ENDIAN, 1 /* signed */);
}
# endif
# if SIZEOF_LONG < SIZEOF_LONG_LONG
if (value > LONG_MAX || value < LONG_MIN)
return PyLong_FromLongLong(value);
# endif
return PyLong_FromLong(Py_SAFE_DOWNCAST(value, sqlite_int64, long));
}
sqlite_int64
_pysqlite_long_as_int64(PyObject * py_val)
{
int overflow;
long long value = PyLong_AsLongLongAndOverflow(py_val, &overflow);
if (value == -1 && PyErr_Occurred())
return -1;
if (!overflow) {
# if SIZEOF_LONG_LONG > 8
if (-0x8000000000000000LL <= value && value <= 0x7FFFFFFFFFFFFFFFLL)
# endif
return value;
}
else if (sizeof(value) < sizeof(sqlite_int64)) {
sqlite_int64 int64val;
if (_PyLong_AsByteArray((PyLongObject *)py_val,
(unsigned char *)&int64val, sizeof(int64val),
IS_LITTLE_ENDIAN, 1 /* signed */) >= 0) {
return int64val;
}
}
PyErr_SetString(PyExc_OverflowError,
"Python int too large to convert to SQLite INTEGER");
return -1;
}

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/* util.h - various utility functions
*
* Copyright (C) 2005-2010 Gerhard Häring <gh@ghaering.de>
*
* This file is part of pysqlite.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef PYSQLITE_UTIL_H
#define PYSQLITE_UTIL_H
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "pythread.h"
#include "sqlcipher/sqlite3.h"
#include "connection.h"
int pysqlite_step(sqlite3_stmt* statement, pysqlite_Connection* connection);
/**
* Checks the SQLite error code and sets the appropriate DB-API exception.
* Returns the error code (0 means no error occurred).
*/
int _pysqlite_seterror(sqlite3* db, sqlite3_stmt* st);
PyObject * _pysqlite_long_from_int64(sqlite_int64 value);
sqlite_int64 _pysqlite_long_as_int64(PyObject * value);
#if SQLITE_VERSION_NUMBER >= 3007014
#define SQLITE3_CLOSE sqlite3_close_v2
#else
#define SQLITE3_CLOSE sqlite3_close
#endif
#endif